Quarterly report pursuant to Section 13 or 15(d)

Accrued Liabilities (Details)

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Accrued Liabilities (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Accrued Liabilities    
Accrued capital expenditures $ 126,476 $ 155,300
Accrued gathering, compression, processing, and transportation expenses 95,441 88,850
Accrued marketing expenses 81,179 59,049
Accrued interest expense 42,399 40,861
Other accrued liabilities 93,334 99,165
Total accrued liabilities $ 438,829 $ 443,225